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Aug
30
accepted Martingale with bounded increment.
Aug
30
asked Martingale with bounded increment.
Aug
1
revised Sum of positive i.i.d. random variables.
added 8 characters in body
Jul
19
accepted The extinction probability of Galton-Watson process from a martingale perspective.
Jul
19
asked The extinction probability of Galton-Watson process from a martingale perspective.
Jul
9
accepted Are there infinitely many $n$ such that $n$ and $2n+1$ are both prime numbers?
Jul
8
asked Are there infinitely many $n$ such that $n$ and $2n+1$ are both prime numbers?
Jun
19
comment Is it possible to have $\mathbb E S_n \to \infty$ but $\inf S_n = -\infty$ a.s.?
@ByronSchmuland Hmm, you're right. $S_n / n \to 2p - 1 > 0$ almost surely, so $S_n \to \infty$ almost surely
Jun
19
revised Is it possible to have $\mathbb E S_n \to \infty$ but $\inf S_n = -\infty$ a.s.?
added 5 characters in body
Jun
19
comment Is it possible to have $\mathbb E S_n \to \infty$ but $\inf S_n = -\infty$ a.s.?
@ByronSchmuland Yeah, you're right about case 1. It should be $S_n = 0$ for all $n$.
Jun
19
asked Is it possible to have $\mathbb E S_n \to \infty$ but $\inf S_n = -\infty$ a.s.?
Jun
18
accepted Sum of positive i.i.d. random variables.
Jun
18
asked Sum of positive i.i.d. random variables.
Jun
17
comment How many ways can $5$ rings be placed on $4$ fingers?
Shouldn't this goes to infinity?
Jun
16
comment combinatorics - Distribution of Distinct Balls into Distinct Boxes
By nPk do you mean $\binom n k$?
Jun
16
accepted Convergence to exponential function.
Jun
14
revised $X,Y$ i.i.d., $X$ and $(X+Y)/\sqrt{2}$ have the same dist., then show that $X$ has a normal distribution
deleted 2 characters in body
Jun
14
answered $X,Y$ i.i.d., $X$ and $(X+Y)/\sqrt{2}$ have the same dist., then show that $X$ has a normal distribution
Jun
13
revised Convergence to exponential function.
added 39 characters in body
Jun
13
asked Convergence to exponential function.